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发明名称
Listing apparatus
摘要
申请公布号
US2174088(A)
申请公布日期
1939.09.26
申请号
US19380226291
申请日期
1938.08.23
申请人
JENSEN HARRY K
发明人
JENSEN HARRY K.
分类号
G09F3/20
主分类号
G09F3/20
代理机构
代理人
主权项
地址
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